Instruction Set Architecture

Instruction Set Architecture (ISA) is like the blueprint for a computer's CPU, defining the language and commands it understands to perform tasks. It specifies the types of instructions, how they are formatted, and how the hardware should interpret and execute them. In essence, ISA acts as a common interface between software (programs) and hardware (the physical processor), ensuring programs can run correctly on different machines with the same ISA. It enables the development of software that works universally across all devices with that architecture.